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Patent US2847158A successfully refreshed from Google Patents.
US2847158A
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Centrifugal separator
Assignee: Alfa Laval Holdings Amsterdam AB
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Filing: 1956-09-12
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Granted: 1958-08-12
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Expires: 1976-09-12
Abstract
No abstract record available.
Inventors
- 👤 Thylefors Henric Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:29
CPC Classifications
B; B04; B04B; B04B1/00; B04B1/10; B04B1/12; B04B1/04; B04B1/08; B04B11/00; B04B11/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-11 | 1962-02-10 | 1962-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-11 | 1966-02-10 | 1966-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-11 | 1970-02-10 | 1970-08-12 | $7700.00 | Window Closed / Lapsed |